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Yoshida, Hidekazu*; Yamamoto, Koshi*; Maruyama, Ippei*; Karukaya, Koichi*; Nakayama, Masashi; Sakurai, Akitaka; Sato, Toshinori
no journal, ,
Spherical, isolated carbonate concretions occur throughout the world in marine argillaceous sedimentary rocks of widely varying geological ages. These concretions are characteristically highly enriched in CaCO compared to the surrounding sedimentary rock matrices and are commonly containing the well-preserved fossils inside. Recently the process of the enrichment of CaCO has been revealed and synthetic concretion materials are developed. Here we will introduce the in-situ experiment with the synthetic concretion material for EDZ sealing carried out in Horonobe Underground Research Laboratory and the preliminary results of the EDZ sealing process and their sealing effectiveness.
Yoshida, Hidekazu*; Yamamoto, Koshi*; Asahara, Yoshihiro*; Karukaya, Koichi*; Saito, Akane*; Matsui, Hiroya
no journal, ,
no abstracts in English
Yoshida, Hidekazu*; Yamamoto, Koshi*; Asahara, Yoshihiro*; Karukaya, Koichi*; Saito, Akane*; Matsui, Hiroya; Mochizuki, Akihito
no journal, ,
The report are the results of the in situ experiment for sealing to underground cavities by a synthetic concretion-forming solvent and observed phenomenon of the sealing function after a earthquake.
Yoshida, Hidekazu*; Yamamoto, Koshi*; Asahara, Yoshihiro*; Karukaya, Koichi*; Saito, Akane*; Matsui, Hiroya; Mochizuki, Akihito
no journal, ,
This report summarized the latest results of in-situ feasibility experiment for self-sealing process of EDZ and flow-paths factures in Horonobe URL of JAEA and calsite crystallization induced by concretion-forming solvent injection was observed on the fracture surface in EDZ.